Mobile machine track shoe

Abstract

A mobile machine track shoe includes a ground engaging surface including a first grouser bar and a second grouser bar substantially parallel to the first grouser bar. The track shoe further includes a base opposite the ground engaging surface. The base includes a first relief disposed opposite the first grouser bar, and a second relief disposed opposite the second grouser bar.

What is claimed is: 
     
       1. A mobile machine track shoe, comprising:
 a ground engaging surface including a substantially planar flat, a first grouser bar extending substantially perpendicular to the flat and a second grouser bar oriented substantially parallel to the first grouser bar; and 
 a base opposite the ground engaging surface, the base including a first relief disposed opposite the first grouser bar and a second relief disposed opposite the second grouser bar; 
 wherein the first and second reliefs have a depth measured from the base to the deepest portion of the relief that is less than a thickness of the track shoe measured from the base to the flat, and 
 wherein the first relief has a first radius, and the second relief has a second radius less than the first radius. 
 
     
     
       2. The track shoe of  claim 1 , further comprising a third grouser bar substantially parallel to the second grouser bar and disposed proximate a leading edge of the track shoe. 
     
     
       3. The track shoe of  claim 2 , wherein the substantially planar flat is disposed between the first and second grouser bars. 
     
     
       4. The track shoe of  claim 3 , wherein at least one of the first, second, and third grouser bars has a width between approximately 12.6 mm and approximately 14.2 mm, the width extending from a first sidewall of the at least one grouser bar to a second sidewall of the at least one grouser bar. 
     
     
       5. The track shoe of  claim 3 , wherein at least one of the first, second, and third grouser bars has a height less than approximately 26 mm, the height extending from the flat to a top surface of the at least one grouser bar. 
     
     
       6. The track shoe of  claim 3 , wherein the flat includes a thickness between approximately 6.5 mm and approximately 8.5 mm, the thickness extending from the flat to the base. 
     
     
       7. The track shoe of  claim 3 , wherein the flat is a first flat including a width extending between a sidewall of the first grouser bar and a first sidewall of the second grouser bar, the track shoe further comprising a second substantially planar flat including a width extending between a sidewall of the third grouser bar and a second sidewall of the second grouser bar, wherein the widths of the first and second flats are approximately equal. 
     
     
       8. The track shoe of  claim 7 , wherein a combined width of the first and second flats comprises approximately half of an overall length of the track shoe. 
     
     
       9. The track shoe of  claim 7 , wherein a combined width of the first, second, and third grouser bars is approximately equal to the width of at least one of the first and second flats. 
     
     
       10. The track shoe of  claim 2 , wherein the first and third grouser bars are spaced substantially equally from the second grouser bar. 
     
     
       11. The track shoe of  claim 1 , wherein a yield strength of the track shoe is between approximately 1205 Mpa and approximately 1960 Mpa. 
     
     
       12. The track shoe of  claim 1 , wherein the first grouser bar has a first centerline and the first relief has a second centerline collinear with the first centerline. 
     
     
       13. The track shoe of  claim 1 , wherein the track shoe comprises steel having a carbon content greater than approximately 0.3%. 
     
     
       14. The track shoe of  claim 1 , wherein the track shoe has a mass between approximately 10 kg and approximately 15 kg. 
     
     
       15. A track shoe for a mobile machine, comprising:
 a ground engaging surface including first and second substantially planar flats, a first grouser bar disposed between a trailing edge of the track shoe and the first flat, a second grouser bar disposed between the first and second flats, and a third grouser bar disposed between the second flat and a leading edge of the track shoe, wherein the first and third grouser bars are spaced substantially equally from the second grouser bar; and 
 a base opposite the ground engaging surface, the base including a first relief disposed opposite the first grouser bar, and a second relief disposed opposite the second grouser bar and substantially parallel to the first relief, wherein the first relief has a first radius, and the second relief has a second radius less than the first radius, 
 wherein the track shoe comprises steel having a carbon content greater than approximately 0.3%. 
 
     
     
       16. The track shoe of  claim 15 , wherein the first radius is between approximately 11 mm and approximately 12 mm, and the second radius is between approximately 4 mm and approximately 5 mm. 
     
     
       17. The track shoe of  claim 15 , wherein a combined width of the first, second, and third grouser bars comprises approximately one quarter of an overall length of the track shoe. 
     
     
       18. A track shoe for a mobile machine, comprising:
 a ground engaging surface including a first grouser bar, a second grouser bar substantially parallel to the first grouser bar, and a third grouser bar substantially parallel to the second grouser bar, at least one of the first, second, and third grouser bars having a height less than approximately 26 mm, and a width between approximately 12.6 mm and approximately 14.2 mm, wherein 
 a combined width of the first, second, and third grouser bars comprises approximately one quarter of an overall length of the track shoe; and 
 a base opposite the ground engaging surface, the base including a first relief and a second relief substantially parallel to the first relief, the first relief including a first radius and the second relief including a second radius less than the first radius, wherein 
 a centerline of the first grouser bar is collinear with a centerline of the first relief and a centerline of the second grouser bar is collinear with a centerline of the second relief.